Low-voltage circuit breaker comprising an interface unit

1. A low voltage circuit breaker ( 1 ) comprising:

a casing containing at least one fixed contact and at least one mobile contact, wherein said circuit breaker comprises, inside said casing,

a first communication bus ( 5 ) designed to interface a plurality of accessory and devices ( 20 , 30 , 40 , 50 ) of said circuit breaker ( 1 ), one of said devices and accessories being a protection unit ( 50 ), and

an interface unit ( 10 ) comprising a plurality of ports ( 11 , 12 , 13 , 14 , 15 ) designed to be connected to said accessory and devices ( 20 , 30 , 40 , 50 ) via said first communication bus ( 5 ),

wherein said protection unit ( 50 ) is connected, via a second communication bus ( 6 ) to a supervision unit ( 2 ) outside the casing of said circuit breaker,

wherein a first communication protocol is for said first communication bus ( 5 ), said first communication protocol being dedicated to the communication between the accessories and devices inside the circuit breaker, and

wherein a second communication protocol is used for said second communication bus ( 6 ), said second protocol being dedicated to the communication between the circuit breaker and said supervision unit, and

wherein said interface unit ( 10 ) is configured in such a way that each of said ports ( 11 , 12 , 13 , 14 , 15 ) can be used indifferently and in an interchangeable way by any one of said accessories and devices ( 20 , 30 , 40 , 50 ).

2. The low-voltage circuit breaker ( 1 ) according to claim 1 , characterized in that one of said devices and accessories is a protection unit ( 50 ) and in that said interface unit ( 10 ) comprises a first port ( 11 ) and at least one second port ( 12 ), the protection unit ( 50 ) being connected, via said first communication bus ( 5 ) to said first port ( 11 ), at least one accessory or device ( 20 ) of said circuit breaker being connected, via said first communication bus ( 5 ), to said second port ( 12 ).

3. The low-voltage circuit breaker ( 1 ) according to claim 2 , characterized in that said accessory or device ( 20 ) is an auxiliary-contact warning device.

4. The low-voltage circuit breaker ( 1 ) according to claim 1 , characterized in that it comprises a plurality of accessories and devices ( 20 , 30 , 40 ), each of said accessories and devices being connected, via said first communication bus ( 5 ), to a corresponding port ( 12 , 13 , 14 ) of said interface unit ( 10 ).

5. The low-voltage circuit breaker ( 1 ) according to claim 1 , characterized in that each of said ports ( 11 , 12 , 13 , 14 , 15 ) can be used indifferently and in an interchangeable way by one of said accessories and devices ( 20 , 30 , 40 , 50 ).

6. The low-voltage circuit breaker ( 1 ) according to claim 1 , characterized in that said accessories and devices ( 20 , 30 , 40 ) are auxiliary contact warning devices and/or actuators for opening, closing, and resetting, and/or solenoid controls, and/or motor controls, and/or devices for loading springs, and/or under voltage relays, and/or displays, and/or temperature sensors, and/or interfaces with the outside world.

7. The low-voltage circuit breaker ( 1 ) according to claim 1 , characterized in that one or more of said accessories and devices ( 20 , 30 , 40 ) are located inside the casing of said circuit breaker.

8. The low-voltage circuit breaker ( 1 ) according to claim 1 , characterized in that said interface unit ( 10 ) performs functions of communication and/or management and/or supply of said accessories and devices ( 20 , 30 , 40 , 50 ).

9. The low-voltage circuit breaker ( 1 ) according to claim 8 , characterized in that the supply is taken from said protection unit ( 50 ).

10. The low-voltage circuit breaker ( 1 ) according to claim 1 characterized in that at least one of said accessories and devices ( 20 , 30 , 40 ) comprises an electronic transducer ( 41 ) for connection with said interface unit ( 10 ) via the communication bus ( 5 ).

11. The low-voltage circuit breaker ( 1 ) according to claim 3 , characterized in that said protection unit ( 50 ) is connected, via a second communication bus ( 6 ), to a supervision system ( 2 ) outside the casing of said circuit breaker.